The value of applying DNA profiling to tandem repeat sequences is that
A. they serve as DNA probes, which indicate where disease-causing alleles are found.
B. the tandem repeat sequences are those that can be made into recombinant DNA.
C. None of the answer choices is correct.
D. a more efficient analytical focus is made on small portions of highly variable DNA sequences.
E. they signal to researchers where there are genes that can be more easily cloned, or grown in stem cells.
D. a more efficient analytical focus is made on small portions of highly variable DNA sequences.
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Which of the following diseases would be the easiest to control in a human population?
A) an infectious disease with wild animals as a reservoir B) an infectious disease with humans as the only reservoir C) an infectious disease with domestic cows as the only reservoir D) an infectious disease with several possible reservoirs
Facilitated diffusion requires
What will be an ideal response?
In bryophytes, flask-shaped gametangia that enclose a single egg are called
a. sporangia b. telopodium c. archegonium d. antheridium e. oogonium
Which of the following statements concerning tetanus is FALSE?
A) Its only source is from deep puncture wounds from rusty nails. B) Its toxin causes simultaneous contraction of both muscles in an antagonistic pair. C) It is a small, motile, obligate anaerobe. D) It produces a terminal endospore that gives the cell a distinctive "lollipop" appearance. E) Its diagnostic feature is characteristic muscle contractions, which are often noted too late to save the patient.